Fifteen steroids were isolated from the soft coral Dendronephthya sp., of which five are determined as new compounds, namely (22E)-3-O-β- formylcholest-5,22-diene (1), (22E)-3-O-β-formyl-24-methyl-cholest-5,22- diene (2), 2-ethoxycarbonyl-2-β-hydroxy-A-nor-cholest-5-ene-4-one (3), (22E)-2-ethoxycarbonyl-2-β-hydroxy-A-nor-cholest-5,22-diene-4-one (4), and (22E)-2-ethoxycarbonyl-2-β-hydroxy-24-mthyl-A-nor-cholest-5,22-diene-4- one (5). 1 and 2 belonged to 3-O-formylated cholesterol analogues, and 3 to 5 are unique ring A-contracted steroids. Their structures were elucidated by extensive 2D NMR in association with IR, MS analysis. © 2004 Elsevier Inc. All rights reserved.
CITATION STYLE
Li, G., Deng, Z., Guan, H., Ofwegen, L. V., Proksch, P., & Lin, W. (2005). Steroids from the soft coral Dendronephthya sp. Steroids, 70(1), 13–17. https://doi.org/10.1016/j.steroids.2004.09.003
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